J. Bio. Env. Sci.11(1), 179-191, July 2017
The present study aimed to evaluate the modeling for the changes in the water levels of the international Anzali lagoon in Iran. Today, despite the measures for the progress of industries and commerce in human societies and increasing welfare and urbanism, the nature and ecosystem have retreated from the people’s lives, causing severe damages to the environment. The changes in the breakwaters of Anzali lagoon and their new arrangements have led to the changes in the water levels of this international site. In this paper, all the required statistical data were collected initially, and changes in the water level during recent years and before the new arrangement of the breakwaters were estimated using a mathematical model. Furthermore, the MIKE-21 numerical model was used to determine the effects of improvement measures on the water level, currents and their changes in the regions of Anzali port and lagoon before and after the new arrangements. The results showed that due to the addition of new arms to the breakwaters of this region (during 2008-2012), an amount of water remained in the lagoon during all the seasons, and the water level of Anzali lagoon and pace of the currents experiences minimal, steady changes, which could have a significant effect on the sedimentation rate, and the lagoon has lower water exchange with the Caspian Sea.
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